C++ Programming Code Examples
C++ > Strings Code Examples
C++ Program to Find Length of Longest Common Substring
/* C++ Program to Find Length of Longest Common Substring */
#include<iostream>
#include<cstring>
using namespace std;
// A utility function to find maximum of two integers
int max(int a, int b)
{
return (a > b)? a : b;
}
/* Returns length of longest common substring of X[0..m-1] and Y[0..n-1] */
int LCSubStr(char *X, char *Y, int m, int n)
{
int LCSuff[m + 1][n + 1];
int result = 0;
for (int i = 0; i <= m; i++)
{
for (int j=0; j<=n; j++)
{
if (i == 0 || j == 0)
LCSuff[i][j] = 0;
else if (X[i-1] == Y[j-1])
{
LCSuff[i][j] = LCSuff[i-1][j-1] + 1;
result = max(result, LCSuff[i][j]);
}
else LCSuff[i][j] = 0;
}
}
return result;
}
int main()
{
char X[] = "Happy Codings";
char Y[] = "C++ Programming Language Code Examples :)";
int m = strlen(X);
int n = strlen(Y);
cout << "Length of Longest Common Substring is " << LCSubStr(X, Y, m, n);
return 0;
}
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